Here is what I know or think I know -
Estimated Year: 1959, YALE ID #: A03 P378963, located on the frame rail under floor pan. Model Number: 6L83-F100, Lift Capacity 10,000 lbs., Three Stage Mast, Front Tire Size: Twin 21 X 6 X 15

Oil is leaking out of the side (left side as you sit on the machine) of bell housing from what appears to be a vent or overflow. It looks like the normal hydraulic oil used in the machine.

From my initial inspection there is a rectangular cover that has a hose feeding it with a metal tube that appears to spray oil onto the throw out bearing and the clutch plate. When I start the machine with the inspection plate off it spurts a steady stream of oil.

I am guessing that there should be some sort of recovery system or return for this oil to go back to the holding tank which may not be working or is blocked. This I surmise is allowing the build up of oil to the point of overflow. It is leaving a pretty good streak of oil on the floor, not just a few drops.

Before I take the machine apart I wanted to see if there was anyone who has worked on these 1950s series machines that could offer any insight.

I would also love to get my hands on a parts or service manual for this machine in hard copy or digital format. If anyone knows where that can be found please forward me or post that lead.